JP6283642B2 - Drug spraying device - Google Patents

Description

  The present invention relates to a chemical spraying device mounted on a seed tape laying machine or the like.

(Structure of Conventional Example 1)
FIG. 10 is an exploded perspective view showing an example of a conventional medicine spraying device.
The frame 2 is attached to the □ 50 square shaft 4 by fitting the □ 50 square mounting bracket 3 to the □ 50 square shaft 4 and fixing the lower end of the frame 2 to the □ 50 square mounting bracket 3 with a nut. . The upper end 2a of the frame 2 is docked to a cylinder 1a attached to the shutter portion of the drug spraying device 1, and fixed by a bolt, whereby the drug spraying device 1 is fixed to the frame 2. The feeding portion 5 attached to the lower part of the hopper 14 for containing the medicine is provided with a shaft hole 5a. The shaft 6a of the knob handle 6 is inserted into the shaft hole 5a, and the shaft 6a is an L-shaped adjustment shutter. 7 is fixed to the upright portion 7a with a nut. The adjustment shutter 7 is in contact with the shutter unit 8 and is moved in the left-right direction, so that the amount of medicine falling from the shutter unit 8 can be adjusted in advance.
The front end of the push-pull wire 10 is screwed and connected to the operation lever 13 installed in the operation box 11. The other end of the push-pull wire 10 is screwed and connected to the open / close shutter 9. The opening / closing shutter 9 is slid by the operation lever 13 so that the hole of the shutter portion 8 can be opened and closed.
A spray port 15 provided at the lower part of the opening / closing shutter 9 is connected to a hose 16.

(Structure of Conventional Example 2)
FIG. 11 is a view showing another example of a conventional medicine spraying device, and is a view of a seed tape laying machine 18 equipped with the medicine spraying device 19 as viewed from the side.
A column metal fitting 21 for fixing the drug spraying device is fixed to the main frame 20 of the seed tape laying machine 18 with screws. The drug spraying device 19 is fixed to the support bracket 21 with bolts. A flange metal fitting 24 attached to the axle position of the rear wheel 22 and a flange metal fitting 23 attached to the roller 26 axial position of the medicine spraying device 19 are connected by a flexible shaft 25.
A hose 27 is attached to the spray port of the drug spraying device 19, and the drug is sprayed on the seed tape portion laid by the hose 27.

(Medical spraying operation of Conventional Example 1)
When the operator rotates the knob handle 6 incorporated in the feeding section 5 below the hopper 14 containing the medicine, the adjustment shutter 7 is moved to the left and right to open the hole 8a provided in the shutter section 8. Adjust.
Thus, by adjusting the opening amount of the hole 8a and pulling the operation lever 13 of the operation box 11, the opening / closing shutter 9 connected to the push-pull wire 10 is opened, and the set amount of medicine falls due to gravity. The drug is discharged from the hose 16 through the spray port 15.
By setting the hose 16 before the seed tape is buried, the drug is spread in a streak shape on the seed tape line. The electric motor 17 performs agitation to make it easy for the medicine supplied to the hopper 14 to fall.

(Medical spraying operation of Conventional Example 2)
When the operator manually pushes the seed tape laying machine 18, the rotation of the rear wheel 22 is transmitted to the roller 26 of the medicine spraying device 19 through the flexible shaft 25. As the roller 26 rotates, the drug contained in the hopper 14 is stirred and discharged from the hose 27 via the spray port by gravity drop.

(Problem of conventional example)
Since the medicine spraying device 1 of the conventional example 1 is configured to feed the medicine by operating the operation lever 13, there is a problem that a certain amount of medicine is sprayed regardless of the vehicle speed. Further, the medicine spraying device 19 of the conventional example 2 has a structure in which the rotation of the rear wheel 22 is transmitted to the lower roller 26 of the hopper 14 through the flexible shaft 25 without using power such as a motor. However, there is a drawback in that the medicine cannot be sprayed only in a necessary portion because the medicine is sprayed while the wheels are always moving.

  The present invention has been made paying attention to the problems of the conventional example, and its purpose is to use a sheet speed detector and a seed detection switch to detect a sheet speed above a certain level and to detect seeds by the seed detection switch. Accordingly, an object of the present invention is to provide a medicine spraying device mounted on a seed tape laying machine capable of determining a target position of a bag and causing the medicine to drop by gravity.

In order to achieve the above object, the medicine spraying device according to claim 1 of the present invention is a seed tape laying machine having a function of detecting the speed of the sheet drawn from the seed tape sheet coating device and detecting the seed of the seed tape. A medicine spraying device mounted on the seed tape sheet covering device, and when the speed of the sheet pulled out from the seed tape sheet coating device is detected, a medicine dropping mechanism for dropping the medicine, and a medicine dropped by the medicine dropping mechanism Under the control of the seed detection signal from the function of detecting the seed once deposited, the drug spraying mechanism for spraying the deposited drug to a predetermined drug spraying position, embedded with a seed tape, It is characterized in that the medicine is sprayed on a predetermined position of the ridge on which the sheet is laid.
According to a second aspect of the present invention, there is provided the medicine dispensing apparatus according to the first aspect, wherein the medicine dropping mechanism has a stepping motor that is driven in accordance with a speed detection signal of the sheet and is accumulated in the hopper. The medicine is dropped by a predetermined amount by the rotation of the stepping motor, and the medicine spraying mechanism drives a shutter having an opening by a solenoid according to a seed detection signal from the function of detecting the seed, and opens the medicine spraying opening to the opening. The deposited drug is dropped by opening at the part.
According to a third aspect of the present invention, there is provided the medicine spraying apparatus according to the first or second aspect, wherein the medicine dropping mechanism is provided with a pan-type feeding piece having a number of depressions under the hopper, and a stepping motor. By rotating the dish-type feeding piece, the medicine is dropped through the depression of the eye-plate type feeding piece.
According to a fourth aspect of the present invention, there is provided the medicine spraying device according to the third aspect of the invention, wherein the dish-type feeding piece is replaceable with a dish-type feeding piece having a different number of recesses in the circumferential direction. It is characterized by that.
According to a fifth aspect of the present invention, there is provided the medicine dispensing apparatus according to the third or fourth aspect, wherein a control circuit for controlling each of the driving unit of the medicine dropping mechanism and the driving unit of the medicine dispensing mechanism is mounted. Is characterized in that the driving unit is controlled so that the medicine is sprayed from a position where the seed is embedded one time before to a position where the next seed is embedded at a predetermined interval.
According to a sixth aspect of the present invention, there is provided the medicine dispensing apparatus according to the fifth aspect, wherein the control circuit reads a sheet speed at which a sheet for coating is pulled out, and whether or not the sheet speed is equal to or higher than a predetermined speed. If the speed exceeds the specified speed, the stepping motor is rotated by an angle unit corresponding to the number of depressions from the pan-type feeding piece attached to the rotating shaft of the stepping motor, and then the seed is dropped. It is characterized in that it is determined whether or not the detection switch detects the seed, and when it is detected, the deposited medicine is sprayed by sliding the shutter by driving the solenoid.

According to the above configuration, since the medicine can be sprayed only at predetermined locations, for example, at the opening portion of the coating sheet of the seed tape sheet coating apparatus shown in Japanese Patent Nos. 3805210, 4036680, 4248342, 4854292, that is, at the seed position. Only the drug can be sprayed, and a significant reduction in drug usage can be expected.
In addition, by attaching a pan-type feeding piece under the medicine hopper and rotating the pan-type feeding piece with a stepping motor, the medicine falls at a timing corresponding to the change in the tractor speed pulling the seed tape laying machine. Therefore, it is possible to reduce unevenness in spraying the medicine. Moreover, since a chemical | medical agent can be sprayed only to the location which perforated the covering sheet, it is possible to carry out pesticide reduction cultivation.

It is a figure which shows the outline of the chemical | medical agent spraying apparatus by this invention, the multi-sheet laying for seed tapes, and the apparatus for seed tape embedding, and is a figure for demonstrating the spraying timing of a chemical | medical agent corresponding to multi-sheet laying and seed tape embedding. . It is a side view which shows embodiment of the seed tape laying machine carrying the chemical | medical agent spraying apparatus by this invention. It is a figure for demonstrating embodiment of the chemical | medical agent dropping mechanism of the chemical | medical agent spraying apparatus by this invention, (a) is a front view of the chemical | medical agent dropping mechanism shown partially broken, (b) is a top view of a chemical | medical agent dropping mechanism (C) is a perspective view of the shield sponge which has the hole which supports a round plate type | formula feeding piece, (d) is an AA end view. It is a top view which shows embodiment of the chemical | medical agent spraying mechanism of the chemical | medical agent spraying apparatus by this invention, and is a figure which shows the state before chemical | medical agent spraying operation | movement. It is a front view which shows embodiment of the chemical | medical agent spraying mechanism of the chemical | medical agent spraying apparatus by this invention. It is a top view which shows embodiment of the chemical | medical agent spraying mechanism of the chemical | medical agent spraying apparatus by this invention, and is a figure which shows the state of chemical | medical agent spraying operation. It is a front view which shows the control box structure of the chemical | medical agent spraying apparatus by this invention. It is a flowchart for demonstrating the flow of control of the chemical | medical agent spraying apparatus by this invention. It is a block diagram which shows embodiment of the control circuit of the chemical | medical agent spraying apparatus by this invention. It is a perspective view for demonstrating the structure of the chemical | medical agent spraying apparatus of the prior art example 1. FIG. It is a side view for demonstrating the structure of the chemical | medical agent spraying apparatus of the prior art example 2. FIG.

Hereinafter, the present invention will be described in more detail with reference to the drawings.
FIG. 1 is a diagram showing an outline of a chemical spraying device, a seed tape multi-sheet laying and a seed tape burying device according to the present invention, for explaining the timing of chemical spraying corresponding to the multi-sheet laying and seed tape burying. FIG.
The functional part that covers the multi-sheet for the seed tape is that the multi-sheet wound on the reel is pulled out, and when it reaches the bottom of the punching device, a hole of a predetermined shape is formed in the multi-sheet, and this multi-sheet is pressed down It is configured to be laid on the fence by rollers. In addition, the functional part that embeds the seed tape in which the seeds are embedded at a predetermined interval is pulled out from the reel, and the seed detection part detects the seed in the path, and the seed tape part is a groove. It is configured to be embedded to a predetermined depth of the ridge by cutting.

The functional part of the medicine spraying is configured such that the medicine in the medicine tank falls through the medicine guide pipe and is sprayed on the basket by a predetermined amount. The seed tape laying machine equipped with the medicine spraying device moves in the direction of arrow B.
In FIG. 1, the state where the chemical | medical agent, a seed tape, and a multi sheet | seat are spread | dispersed, embed | buried, and laid is shown in the position L1 of a ridge. Thus, in order to spread the medicine on the opening portion of the multi-sheet (seed embedding position of the seed tape), the distance from the position L1 to the lower part of the punching device is A1, the distance to the seed detection unit is A2, When the distance is A3, it is necessary to lay and bury a multi-sheet and a seed tape so that A1 = A2 = A3 and control the timing of spraying the medicine. The seed tape embedded up to the position of L1 is embedded toward the next seed position as indicated by a two-dot chain line D. At the same time, the multi-sheet is laid on the roof toward the next opening as indicated by a two-dot chain line C. In this way, the multi-sheet and the seed tape are laid and embedded, and control is performed so that the chemical is sown before the next multi-sheet opening and the seed tape seed are laid and embedded. FIG. 1 shows a state in which a medicine is sprayed at a position L2 for spraying medicine.

FIG. 2 is a view showing the entire seed tape laying machine equipped with the medicine spraying device according to the present invention.
The seed tape laying machine is provided with a seed tape embedment having a hole at a predetermined position of the sheet, and a seed tape sheet coating device 28 for covering the sheet with the seed and a seed detection switch 30 for detecting the seed of the seed tape to be embedded. The device is installed.
A roller 29a is in contact with the rotating portion of the reel 32a around which the covering sheet 32 is wound, and the roller 29a is integrally attached with a gear 29b having ten teeth on the outer periphery. When the roller 29a rotates according to the rotation of the covering sheet 32, the gear 29b also rotates. A sheet speed detector (sensor) 29 that detects the rotating teeth of the gear 29b and outputs an electric signal is installed. The covering sheet 32 drawn out from the reel 32a is guided by the guide rollers 33a and 33b, and after the U-shaped cutting portion is formed by the cutting mechanism portion 34, it is laid on the bag by the pressure reducing roller 35. The electrical signal of the sheet speed detector 29 is monitored by a microcontroller 68 (see FIG. 9). When the microcontroller 68 detects six or more electrical signals in a predetermined period by the sheet speed detector 29, the coated sheet 32 is detected. Is pulled out at a predetermined speed or more, and the stepping motor 39 (see FIG. 3) of the medicine dropping mechanism A is driven to rotate the round pan-type feeding piece 40.

  The seed tape 31 is drawn out from the reel 31a, and the drawn seed tape 31 is buried at a predetermined depth of the culm through the pipe guide and the sowing pipe 58. A seed detection switch 30 for detecting the seed of the seed tape is provided in the guide pipe path. The detection signal of the seed detection switch 30 is also monitored by the microcontroller 68. When receiving the seed detection signal, the microcontroller 68 slides the shutter 44 (see FIG. 6) and moves the shutter port 44a to the position of the medicine spray port 47b.

The medicine spraying device 36 has a medicine dropping mechanism A for dropping the medicine replenished in the hopper 55 and a medicine at a predetermined position where the dropped medicine is once accumulated and a sheet and a seed tape are laid and embedded. A drug spraying mechanism B for spraying
A medicine dropping mechanism A is incorporated in the lower part of the hopper 55, and a hose 48 for guiding the medicine to fall is connected to the medicine dropping mechanism A. A lower end 48 a of the hose 48 is inserted and connected to the hose guide 47, and a medicine spraying port 47 b is formed in a hose guide bottom 47 a (see FIG. 4) at the lower end of the hose guide 47.
A □ 50 square mounting bracket 37 is fixed to the medicine dropping mechanism A, and the □ 50 square mounting bracket 37 is fixed to the □ 50 square shaft 4 that is mounted to the tractor hitch by bolts and nuts. The medicine mounting bracket 38 is attached to the lower part of the square mounting bracket 37, and the other end of the medicine mounting bracket 38 and the vertical plate portion of the L-shaped plate 38a are overlapped and screwed to the frame 57 of the wheel 59. The horizontal plate portion of the L-shaped plate 38a is attached to the lower surface of the base plate 64 (see FIGS. 4 and 5) of the drug spraying mechanism B and supports the drug spraying mechanism B. Therefore, the height of the drug spraying port 47b (see FIG. 4) can be adjusted by moving the position of the long hole provided in the vertical plate portion of the L-shaped plate 38a up and down with screws.

3A and 3B are diagrams for explaining an embodiment of the medicine dropping mechanism of the medicine spraying device according to the present invention. FIG. 3A is a front view of the medicine dropping mechanism partially broken, and FIG. The top view of a mechanism, (c) is a perspective view of the shield sponge which has the hole which supports a countersunk type round feeding piece, (d) has shown AA end elevation, respectively.
The medicine dropping mechanism A is provided with a pan-type round feeding piece 40 that rotates as shown by an arrow 39a at the bottom of the hopper 55 that stores medicine.
The pan-type round feeding piece 40 can be rotated by a predetermined angle by a stepping motor 39. The round plate-type feeding piece 40 is inserted into the rotation support hole 62 b of the shield sponge 62 and rotates around the mounting shaft 41. The stepping motor 39 is fixed to the hopper 55 with screws, and the motor shaft of the stepping motor 39 is connected to the mounting shaft 41 of the countersunk circular feeding piece 40 by screwing.
The shield sponge 62 has a rectangular shape as shown in (c), has a feeding piece rotation support hole 62b in the center, and a medicine drop hole 62a penetrating from the upper surface to the lower surface.

A drop opening 63 is provided for each medicine drop hole 62a at the bottom of each shield sponge 62. In this embodiment, the round pan-type feeding piece 40 has six depressions 40a in the axial direction. An eye plate type circular feeding piece 40 is inserted and attached to each shield sponge 62.
The medicine dropped from the medicine drop hole 62a is accumulated in the depression 40a at the uppermost position of the eye plate type circular feeding piece 40, and the uppermost position is successively applied each time the eye plate type round feeding piece 40 rotates by a predetermined angle. When the drug is deposited in the depression 40a that has reached the bottom and the depression 40a on which the drug is deposited reaches the bottom, the drug falls from the drop port 63.
The eye plate type round feeding piece 40 of this embodiment has six recesses in the axial direction and four in the circumferential direction. The rotation angle per step of the spping motor 39 is rotated by 90 degrees when the number of recesses in the circumferential direction is four. When the number of depressions is 6, the rotation angle is 60 degrees, and when it is 8, the rotation angle is 45 degrees. The pan-type round feeding piece 40 can be replaced with a round-type round feeding piece having a different number of recesses in the circumferential direction.
The rotational speed of the pan-type round feeding piece 40 changes in accordance with the moving speed of the seed tape laying machine.

FIG. 4 is a plan view partially showing a drug spraying mechanism of the drug spraying device, and FIG. 5 is a front view of the drug spraying mechanism of the drug spraying device.
On the base plate 64, a hose guide bottom portion 47a having a medicine spraying port 47b configured integrally with the hose guide 47 is installed. A shutter 44 having a shutter opening 44a having substantially the same shape as the medicine spraying opening 47b is slidably installed on the lower surface of the hose guide bottom 47a.
The telescopic bar (1) 46a, the telescopic bar (2) 46b, the telescopic bar (3) 46c, and the telescopic bar (4) 46d are rotatably integrated at each of four intersections by the rotation support pins 65c, and the cross-shaped group The body is formed. The solenoid 43 is installed on the base plate 64, and the drive shaft 43a is connected to the end of the expansion / contraction bar (4) 46d of the cross beam-shaped assembly. In addition, the end of the telescopic bar (2) 46b is connected to the shutter 44. Further, a spring 45 is stretched between the end of the telescopic bar (1) 46a and the spring support shaft 45a. FIG. 4 shows a state in which the spring 45 is contracted, the contraction / contraction bar (2) 46b pushes the shutter 44 upward, and the medicine spraying port 47b is closed.

As shown in FIG. 5, the hose end 48a of the hose 48 is inserted into the hose guide 47, and the medicine dropped in the hose 48 accumulates above the shutter 44 when the medicine spraying port 47b is not open. Yes.
FIG. 6 is a plan view showing an embodiment of the medicine spraying mechanism of the medicine spraying apparatus according to the present invention, and shows a state where the medicine spraying mechanism is activated.
The cross beam-shaped assembly uses the rotation support shaft 65a as a rotation fulcrum, and when the solenoid 43 is activated and the drive shaft 43a is pulled in the direction of the arrow 43b, it rotates counterclockwise around the rotation support shaft 65a. (2) The shutter 44 connected to 46b slides in the direction of the arrow 44b, the shutter port 44a overlaps the drug spray port 47b, and the drug deposited on the hose guide bottom 47a that overlaps the shutter 44 falls to the target position. To do. When the solenoid 43 is turned off, the cross beam-shaped assembly is rotated clockwise by the biasing force of the spring 45, returns to the position shown in FIG. 4, and the medicine spraying port 47b is closed.

FIG. 7 is a front view showing the structure of the control box of the medicine spraying device according to the present invention.
The medicine spraying device 36 uses a tractor battery (power supply 67 in FIG. 9) as a power source, and controls the medicine spraying operation only when the power switch 50 provided in the control box 49 is switched to the ON side.
In the control box 49, a cable for sending a cutting control signal to the cutting mechanism 34, a cable for sending the sheet speed detection signal of the sheet speed detector 29, a signal cable for driving the solenoid 43, and a stepping motor are driven. Each has a hole for connecting a cable for transmitting a signal for connection to a control board (not shown). The cutting mechanism cable grommets 53a and 53b, the sensor cable grommets 54, the solenoid cable grommets 51, and the stepping motor grommets 52 are fitted into the holes. This figure shows a state in which each cable is not inserted.

FIG. 8 is a flowchart for explaining the flow of control of the medicine spraying device according to the present invention, and FIG. 9 is a block diagram showing an embodiment of the control circuit of the medicine spraying device according to the present invention.
When the power switch 50 is turned on (step (hereinafter referred to as “S”) 1), the microcontroller 68 of the control circuit 66 starts controlling the spraying. The microcontroller 68 reads the sheet speed output from the sheet speed detector 29 (S2), and monitors whether the sheet speed is read at a predetermined speed or more (the number of gear teeth is 6 or more) (S3). If the speed is not higher than the predetermined speed, the process returns to S2 and the reading operation is continued. When the speed exceeds the predetermined speed, a drive signal is sent to the stepping motor 39 to drive the stepping motor 39 at a rotation corresponding to the sheet drawing speed (S4). When the number of depressions in the circumferential direction of the round plate-type feeding piece 40 is four, the stepping motor 39 rotates by 90 degrees, and the medicine falls from the medicine dropping mechanism A into the hose 48.

Next, the microcontroller 68 monitors whether or not the seed detection switch 30 has detected the seed and turned on (S5). If the seed detection switch 30 is in the off state, the detection operation is continued. When the seed detection switch is turned on, the solenoid 43 is driven (S6), the shutter port 44a is slid and overlapped with the drug spray port 47b (S7), and the drug deposited on the hose guide bottom 47a above the shutter is sprayed.
Since the control of the chemical spraying is performed as described above, it is possible to spray the chemical at a position arbitrarily set corresponding to the sheet speed drawn from the seed tape sheet coating device laid by the seed tape laying machine. It becomes possible. Further, since the drug is sprayed in response to the change in the tractor speed, the unevenness of the drug spray can be reduced. Furthermore, since a chemical | medical agent can be sprayed only to the location which the perforated sheet | seat perforated, it is possible to carry out reduced pesticide cultivation.

  In the above embodiment, the medicine dropping mechanism is structured such that the medicine is dropped by rotating the eye plate type round feeding piece by the stepping motor. However, the members used for the medicine dropping mechanism are the stepping motor and the eye dish type round feeding. Other members may be used instead of the top. In addition, the medicine spraying mechanism has a structure in which the shutter is slid by driving the solenoid to open the medicine spraying port, but the mechanism for spraying the medicine at the timing of seed detection is not a member of the solenoid or shutter, but other members. It is also possible to realize with.

  It is a chemical spraying device mounted on a seed tape laying machine.

DESCRIPTION OF SYMBOLS 1 The chemical | medical agent spraying apparatus of the prior art example 1 2 Frame 3 □ 50 square mounting bracket 4 □ 50 square shaft 5 Feeding part 6 Knob handle 7 Adjustment shutter 8 Shutter part 9 Opening / closing shutter 10 Push pull wire 11 Operation box 12 Operation switch 13 Operation lever 14 Hopper 15 Spraying port 16 Hose 17 Electric motor 18 Seed tape laying machine 19 Chemical spraying device 20 of conventional example 20 Main frame 21 Support bracket 22 Rear wheel 23 Flange bracket for roller shaft 24 Flange bracket for rear wheel shaft 25 Flexible shaft 26 Roller 27 Hose 28 Seed tape sheet coating device 29 Sheet speed detector 30 Seed detection switch 31 Seed tape 32 Cover sheet 33a, 33b Guide roller 34 Cutting mechanism 35 Pressure reducing roller 36 Drug spraying device 37 Mounting bracket 38 Drug mounting bracket 39 Stepping motor 40 Eye plate type circular feeding piece 40a Depression 41 Mounting shaft 43 Solenoid 44 Shutter 45 Spring 46a, 46b, 46c, 46d Telescopic bar 47 Hose guide 47a Hose guide bottom 47b Drug spray port 48 Hose 49 Control box 50 Power switch 51 Solenoid cable grommet 52 Stepping motor grommet 53a, 53b Cutting mechanism cable grommet 54 Sensor cable grommet 55 Hopper 56 Indicator light 57 Frame 58 Seeding pipe 59 Wheel 60 Treading pressure roller 61 Earth disk 62 Shield Sponge 63 Drop port 64 Base plate 65a Rotation support shaft 65b Limit pin 65c Rotation support pin 66 Control circuit 68 Microcontroller

Claims (6)

A chemical spraying device mounted on a seed tape laying machine having a function of detecting the speed of a sheet drawn from the sheet coating device for seed tape and detecting the seed of the seed tape,
A drug dropping mechanism that drops the drug when detecting a speed equal to or higher than a predetermined speed of the sheet drawn from the seed tape sheet coating apparatus;
A medicine spraying mechanism for temporarily depositing the medicine dropped from the medicine dropping mechanism and spraying the deposited medicine on a predetermined medicine spraying position under the control of a seed detection signal from the function of detecting the seed; With
A drug spraying device, characterized in that a drug is sprayed to a predetermined position of a basket on which a seed tape is embedded and a sheet is laid. The medicine dropping mechanism is
It has a stepping motor that is driven according to the speed detection signal of the sheet, the medicine stored in the hopper is dropped by a predetermined amount by the rotation of the stepping motor,
The drug spraying mechanism is
The deposited medicine is dropped by driving a shutter having an opening by a solenoid and opening a medicine spraying port at the opening by a seed detection signal from the function of detecting the seed. The medicine spraying device described. The medicine dropping mechanism is
It is characterized in that the medicine is dropped through the depression of the eye plate type feeding piece by attaching the eye plate type feeding piece having many depressions under the hopper and rotating the eye plate type feeding piece by the stepping motor. The medicine spraying device according to claim 1 or 2.   The medicine spraying device according to claim 3, wherein the dish-type feeding piece is configured to be exchangeable with a dish-type feeding piece having a different number of recesses in the circumferential direction. Equipped with a control circuit for controlling the driving part of the medicine dropping mechanism and the driving part of the medicine spraying mechanism,
5. The control unit according to claim 3, wherein the control circuit controls the driving unit so that the medicine is sprayed from a position where the seed is embedded before to a position where the next seed is embedded at a predetermined interval. Drug spraying device. The control circuit includes:
Read the sheet speed at which the sheet for coating is pulled out, determine whether the sheet speed exceeds the predetermined speed, and if it exceeds the predetermined speed, use the pan-type feeding piece attached to the rotating shaft of the stepping motor The drug is dropped by rotating the stepping motor in angular units according to the number of depressions,
Next, determine whether the seed detection switch detects the seed,
6. The drug spraying device according to claim 5, wherein when the detection is performed, the deposited drug is sprayed by sliding a shutter by driving a solenoid.